APM: S0 Location: Main St and I-40, Barstow Reassurance shield as I-15 Business begins. This is an odd business loop because it extends past I-15 to connect to I-40. This segment between I-40 and I-15 is actually in the books as a spur of SR 40, but it is not signed as such anywhere, so … Continue reading Interstate 15 Business, I-40 to I-15